well I'm coming from a complete different aspect to this. I race 1/5 scale r/c cars that most use zenoah 23cc two strokes well being the tinkerer that I'am I would like to try a four stroke . most people don't want to even give them the time of day because of the power to size and weight ratio. I've been following people playing with the honda gx 31 for aiplanes and boat conversions with people having just average success. there is one thing I have'nt seen people try and that is would there be a major jump in performance if the motor was switched to run on high nitro glow fuel? what do you folks think?